Patents by Inventor Masafumi Sakaguchi
Masafumi Sakaguchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11947124Abstract: A display device of the present disclosure includes an optical system, the optical system including an image light generation device configured to generate image light, a projection optical system including an optical element, the optical element including an optical surface asymmetric in a direction along at least a first axis of two axes orthogonal to each other and perpendicular to an optical axis of the image light, a support member configured to support the optical element, a first adjustment mechanism configured to adjust a position of the optical element in the direction along the first axis, and a second adjustment mechanism configured to adjust a position of an emission region of the image light in the direction along the first axis.Type: GrantFiled: August 27, 2020Date of Patent: April 2, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Masatoshi Yonekubo, Masafumi Sakaguchi
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Publication number: 20210063756Abstract: A display device of the present disclosure includes an optical system, the optical system including an image light generation device configured to generate image light, a projection optical system including an optical element, the optical element including an optical surface asymmetric in a direction along at least a first axis of two axes orthogonal to each other and perpendicular to an optical axis of the image light, a support member configured to support the optical element, a first adjustment mechanism configured to adjust a position of the optical element in the direction along the first axis, and a second adjustment mechanism configured to adjust a position of an emission region of the image light in the direction along the first axis.Type: ApplicationFiled: August 27, 2020Publication date: March 4, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Masatoshi YONEKUBO, Masafumi SAKAGUCHI
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Patent number: 10871651Abstract: A display device includes a first diffraction element that deflects image light and causes the image light to be incident on an eye of an observer, and a second diffraction element disposed between an image light projecting device and the first diffraction element. A diffraction direction of the first diffraction element and the second diffraction element is set depending on whether a sum of the number of reflections of light and the number of times of generating intermediate image between the second diffraction element and the first diffraction element is an even number or an odd number. For example, when the sum is an even number, a direction in which light incident on a first incident surface is diffracted at the highest diffraction efficiency is the same direction as a direction in which light incident on a second incident surface is diffracted at the highest diffraction efficiency.Type: GrantFiled: January 25, 2019Date of Patent: December 22, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Toshiyuki Noguchi, Masafumi Sakaguchi
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Publication number: 20190235249Abstract: A display device includes a first diffraction element that deflects image light and causes the image light to be incident on an eye of an observer, and a second diffraction element disposed between an image light projecting device and the first diffraction element. A diffraction direction of the first diffraction element and the second diffraction element is set depending on whether a sum of the number of reflections of light and the number of times of generating intermediate image between the second diffraction element and the first diffraction element is an even number or an odd number. For example, when the sum is an even number, a direction in which light incident on a first incident surface is diffracted at the highest diffraction efficiency is the same direction as a direction in which light incident on a second incident surface is diffracted at the highest diffraction efficiency.Type: ApplicationFiled: January 25, 2019Publication date: August 1, 2019Applicant: SEIKO EPSON CORPORATIONInventors: Toshiyuki NOGUCHI, Masafumi SAKAGUCHI
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Patent number: 7819069Abstract: A showcase has shelf devices in a chamber having a plurality of open surfaces, a pair of shelf support members which extend in a depth direction of the chamber supporting the shelves in a position where adjacent shelves are butted with each other. A support member side portion protrudes from a lower portion of one shelf support member to another shelf support member, a support member side portion protrudes from a lower portion of the other shelf support member to the one shelf support member and superimposed on the support member side portion, a shelf side portion has bottom side superimposed on the support member side portion, a shelf side portion formed under the adjacent shelf has a bottom side superimposed on the shelf side portion, and a bonding member detachably bonds the support side portions and shelf side portions in a superimposed position.Type: GrantFiled: February 16, 2007Date of Patent: October 26, 2010Assignee: Sanyo Electric Co., Ltd.Inventors: Tsutomu Tanaka, Masafumi Sakaguchi, Tomohiro Okubo, Yasuhiko Hayashi, Masahiko Nagatake
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Patent number: 7623200Abstract: The invention provides a polarizing plate used in a liquid crystal device. The polarizing plate according to an aspect of the invention includes: a polarizing film; and a first protection layer that has a predetermined first optical axis, wherein the first protection layer is disposed either directly or indirectly on one surface of the polarizing film with the first optical axis of the first protection layer being aligned in parallel with a transmission axis of the polarizing film.Type: GrantFiled: August 29, 2007Date of Patent: November 24, 2009Assignee: Seiko Epson CorporationInventors: Masafumi Sakaguchi, Yoshitake Tateno
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Patent number: 7616270Abstract: An electro-optical device includes a liquid crystal device; a holder that holds the liquid crystal device; and an incident window bored through the holder, the incident window allowing a light beam emitted from a light source to be transmitted therethrough to the liquid crystal device. A window frame of the incident window has low reflectivity portions having a low reflectivity of diagonal light toward the liquid crystal device, the diagonal light being included in the light beam directed to the window frame.Type: GrantFiled: February 20, 2007Date of Patent: November 10, 2009Assignee: Seiko Epson CorporationInventors: Hidekazu Hirabayashi, Tomoaki Miyashita, Masafumi Sakaguchi
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Publication number: 20090161029Abstract: A display device includes a light source and an image generating unit that modulates light from the light source and generates an image. The image generating unit includes a color modulating element that performs color modulation for the light of the light source based on color information separated from image information, a luminance modulating element that performs luminance modulation for the light of the light source based on luminance information separated from the image information, and a relay optical system that relays the light of the light source between the color modulating element and the luminance modulating element. The relay optical system includes a focus adjusting mechanism that images an optical image at one modulating element between the color modulating element and the luminance modulating element on the light incident side of the other modulating element.Type: ApplicationFiled: December 22, 2008Publication date: June 25, 2009Applicant: Seiko Epson CorporationInventor: Masafumi SAKAGUCHI
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Patent number: 7390095Abstract: Aspects of the invention can provide a projector that includes three optical modulators which modulate respectively red light, green light, and blue light, a color-synthetic optical system which synthesizes the light modulated by the three optical modulators, and a projection optical system which projects the light synthesized by the color-synthetic optical system. The color-synthetic optical system can include a first reflection film that reflects the green light, and a second reflection film that reflects the blue light, the first reflection film and the second reflection film are arranged in the shape of an X character, and a wavelength in which a reflectance factor of the first reflection film comes to 50% can be longer than a wavelength in which a reflectance factor of the second reflection film comes to 50%.Type: GrantFiled: October 5, 2005Date of Patent: June 24, 2008Assignee: Seiko Epson CorporationInventors: Kanji Yoshida, Hidemasa Yamakawa, Joji Karasawa, Masafumi Sakaguchi
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Publication number: 20080062356Abstract: A polarizing plate includes a polarizing film having a transmission axis and a first protection layer having a predetermined first optical axis formed by stretching the first protection layer. The first protection layer is disposed on one side of the polarizing film such that the first optical axis is aligned with the transmission axis of the polarizing film.Type: ApplicationFiled: September 7, 2007Publication date: March 13, 2008Applicant: SEIKO EPSON CORPORATIONInventor: Masafumi SAKAGUCHI
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Publication number: 20080055522Abstract: The invention provides a polarizing plate used in a liquid crystal device. The polarizing plate according to an aspect of the invention includes: a polarizing film; and a first protection layer that has a predetermined first optical axis, wherein the first protection layer is disposed either directly or indirectly on one surface of the polarizing film with the first optical axis of the first protection layer being aligned in parallel with a transmission axis of the polarizing film.Type: ApplicationFiled: August 29, 2007Publication date: March 6, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Masafumi SAKAGUCHI, Yoshitake TATENO
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Patent number: 7329007Abstract: A projector includes an illumination device, a color separation system, a light combining system, a projection system, and an optical adjustment portion. The color separation system separates the light emitted from the illumination device into blue light, red light, and green light. The light combining system can have a first dichroic filter reflecting one of blue light or red light, and a second dichroic filter reflecting green light which are placed in a crossed state and can combine image lights of respective colors exiting from the first through third light modulation devices. The projection system can project a combined light exiting from the light combining system while correcting chromatic aberrations of magnification of blue light and red light with respect to green light. The optical adjustment portion can adjust a size of an image light corresponding to the green light of the combined light exiting from the light combining system.Type: GrantFiled: October 5, 2005Date of Patent: February 12, 2008Assignee: Seiko Epson CorporationInventors: Joji Karasawa, Hidemasa Yamakawa, Kanji Yoshida, Masafumi Sakaguchi
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Patent number: 7275993Abstract: A camera picks-up an image external of a game machine and outputs image pick-up data Dv. A display control part controls the camera to pick-up an image and outputs the image pick-up data DV to an external device. In this case, a display device for displaying an image for a game is provided. When prescribed conditions are satisfied, the display control part controls the display device to display an image based on image data Dp extracted from the image pick-up data Dv as a part of the image for a game.Type: GrantFiled: August 8, 2003Date of Patent: October 2, 2007Assignee: Seiko Epson CorporationInventors: Toshiyuki Hosaka, Masafumi Sakaguchi
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Publication number: 20070193480Abstract: An object is to provide a showcase in which shelves can stably be installed and in which improvements of display performance and appearance can be realized, and a showcase provided with shelf devices in a chamber having a plurality of open surfaces comprises a pair of shelf support members which extend in a depth direction of the chamber and which support the shelves in a position where the adjacent shelves are butted with each other, respectively; a support member side superimposed portion which protrudes from a lower portion of one shelf support member to the other shelf support member; a support member side superimposed portion which protrudes from a lower portion of the other shelf support member to the one shelf support member and which is superimposed on the support member side superimposed portion; a shelf side superimposed portion which has a bottom side superimposed on the support member side superimposed portion; a shelf side superimposed portion which is formed under the adjacent shelf and which haType: ApplicationFiled: February 16, 2007Publication date: August 23, 2007Applicant: SANYO ELECTRIC CO., LTD.Inventors: Tsutomu Tanaka, Masafumi Sakaguchi, Tomohiro Okubo, Yasuhiko Hayashi, Masahiko Nagatake
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Publication number: 20070195222Abstract: An electro-optical device includes a liquid crystal device; a holder that holds the liquid crystal device; and an incident window bored through the holder, the incident window allowing a light beam emitted from a light source to be transmitted therethrough to the liquid crystal device. A window frame of the incident window has low reflectivity portions having a low reflectivity of diagonal light toward the liquid crystal device, the diagonal light being included in the light beam directed to the window frame.Type: ApplicationFiled: February 20, 2007Publication date: August 23, 2007Applicant: Seiko Epson CorporationInventors: Hidekazu Hirabayashi, Tomoaki Miyashita, Masafumi Sakaguchi
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Patent number: 7256935Abstract: To eliminate ghosts caused by retroreflection of projected light and obtain high resolution images. Fine irregularities 5 are randomly formed on the plane of incidence 2a of a Fresnel lens sheet 2 with little space between them. The glossiness (Gs 60°) of the fine irregularities 5 formed by such a random pattern is equal or less than 35%. The fine irregularities 5 are in a semispherical shape, the level difference is about 10 ?m, and the maximum diameter is about 50 ?m. Projected light L is scattered by the fine irregularities 5 at the plane of incidence 2a, subjected to vector resolution, and has its optical intensity weakened, so that retroreflection light can be prevented.Type: GrantFiled: April 2, 2003Date of Patent: August 14, 2007Assignee: Seiko Epson CorporationInventor: Masafumi Sakaguchi
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Patent number: 7167306Abstract: The present invention provides an excellent transmissive screen allowing a well-balanced increase in the vertical, horizontal, and oblique viewing angle characteristics for enhancing the viewing angle characteristics, and a rear projector including the transmissive screen. A transmissive screen can include a Fresnel lens portion having Fresnel lens components on its light-exiting surface, and a microlens array portion disposed at the light-exiting surface side of the Fresnel lens portion and having many microlenses on its light-incident surface. The microlenses of the microlens array portion are arrayed vertically and horizontally such that adjacent microlenses have common sides and the microlens array portion is rotated by 45°.Type: GrantFiled: August 26, 2003Date of Patent: January 23, 2007Assignee: Seiko Epson CorporationInventors: Masafumi Sakaguchi, Hideto Yamashita
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Patent number: 7156523Abstract: Aspects of the invention can provide a projector can include an illumination device that outputs illumination light, a color separation system that divides the illumination light output from the illumination device into blue light, red light, and green light and guides the blue light, red light, and green light to first to third optical paths, respectively, and first to third light modulation devices disposed in the first to third optical paths to be illuminated by the blue light, red light, and green light. In the projector, a distance from the illumination device to the third optical modulation device can be longer than a distance from the illumination device to the first optical modulation device and a distance from the illumination device to the second optical modulation device, a relay system having a first lens disposed at the light incident side, a second lens disposed at the light exit side, and a third lens disposed between the first and second lenses can be provided in the third optical path.Type: GrantFiled: September 6, 2005Date of Patent: January 2, 2007Assignee: Seiko Epson CorporationInventors: Hidemasa Yamakawa, Joji Karasawa, Masafumi Sakaguchi, Kanji Yoshida
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Publication number: 20060203333Abstract: A substrate with a plurality of concave portions according to the invention includes a substrate having a plurality of concave portions. The concave portions are formed on the substrate by means of an etching process so that the plurality of concave portions are randomly arranged on the substrate. First, a non-polymerized resin is applied to the face on which the concave portions of the substrate with concave portions for microlenses are formed. By polymerizing and hardening (solidifying) this resin and further removing the substrate with concave portions for microlenses from a resin layer, the resin layer is formed on the substrate. Thus, microlenses that are constituted from the resin filled in the concave portions and function as convex lenses are formed in the resin layer.Type: ApplicationFiled: June 2, 2006Publication date: September 14, 2006Applicant: SEIKO EPSON CORPORATIONInventors: Hideto Yamashita, Masafumi Sakaguchi, Nobuo Shimizu
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Patent number: 7061682Abstract: In a method of forming a colored layer on a microlens substrate according to the present invention, a colored layer 4 is formed on troughs 32 between adjacent microlenses 3 by applying a liquid 42 for forming a colored layer 4 with fluidity onto the side of the microlens substrate 1 where the microlenses 3 are provided, and then hardening the applied liquid 42 to form a colored layer 4 in the troughs 32. A colored dispersion liquid in which a dispersoid is dispersed in a dispersion medium is suitably used as the liquid 42. It is preferable that the liquid 42 for forming a colored layer 4 has a coefficient of viscosity of 500 cP or less at a temperature of 25° C.Type: GrantFiled: June 2, 2004Date of Patent: June 13, 2006Assignee: Seiko Epson CorporationInventors: Hideto Yamashita, Masafumi Sakaguchi